An orchestral remix of the song, titled Gyakkō no Flügel (Ver.Sōyoku no Sirius) (逆光のフリューゲル（Ver.双翼のシリウス）,Gyakkō no Flügel (Ver.Sōyoku no Sirius)? "Backlit Wings (Sirius of Zwei Wing Ver.)") was featured in the XDU event Sōyoku no Sirius.

"Can you hear it...?" The dramatic music playing.Let it sound outtoward the sky!Can you hear it...?" The pulsing heartbeat when a life starts.Thrust your loveinto the air

That day,in the distance,when the starsbecame musicThe season when hairsways in the wind,let's you and Imake our heartbeats into a song.With that,our dreamsopened
Into a brand new world...

Yes, just believe. Let's make history with a light the likes even God hasn't seen.A futureflooded with light
Won't you fly there with us?
Wings stained with tears of just feeling
When it feels like you can't flap those wings anymore, make a wishI'll hold that handand add my strength to yours
When we're together, our singing hearts become wings.

The day when I understand will come, soI will never... Forget.And at that time, I will not forget
The way my heart was... When you smiled.

Youand Ican definitely,as one bird,Holding handslike long ago,Make a great leapacross the big blue skySo that's whatI'm livingfor
Toward the light of a brand new day

Yes, just believe, a thousand years later or today, even if I'm reborn or change, I'll still want to singThis warmthis so gentle
And I'll never let it go.
Just feeling. There's no such thing as fate.
This is my story, so I jump.If you feel that you want to run away,just look at the stars.
Courage definitely shines bright, a singing star

That day,in the distance,when the starsbecame musicWhen I met you,it probably was already woven into legendI'm notafraid ofanything.
Let's go to a brand new world...

Yes, just believe. Let's make history with a light the likes even God hasn't seen.A future floodedwith light
Won't you fly there with us?
Wings stained with tears of just feeling
When it feels like you can't flap those wings anymore, make a wishMelodies fuseand become a symphony
When we're together, our singing hearts become wings.
Let's go higher, even higher than the Sun.

Trivia

This song was later re-recorded to contain the vocals of all Symphogear users (minus Miku and Serena) in the credits of the last episode of G, titled "Nijiiro no Flügel". It has since been used as the ending song for the finales of GX and AXZ.

A re-recording featuring Miku instead of Kanade, titled "Ashita e no Flügel", was used as the ending song for XV's finale. This version has completely different lyrics to the original.

The subtitle for G — "In the distance, that day, when the star became music" — is taken from the first line of the second verse.

Similarly, the subtitle for XV — "Create a history, with the light God could not know," — is based on the first line of the third verse.

Ver.Sōyoku no Sirius was originally meant to be released as an 11th track on the first XDU character song album, but was pulled from the tracklist just before release. Why this happened is unknown.

Hibiki and Miku sung this song as a duet in the Symphogear manga.

This song has an instrumental remixed BGM available on the second S1 soundtrack, titled Dokomademo, Don'na Mono Demo (Gyakkō no Flügel) (どこまでも、どんなものでも (逆光のフリューゲル),Dokomademo, Don'na Mono Demo (Gyakkō no Furyūgeru)?, lit. "Anywhere, Anything (Backlit Wings)"). The BGM sounds very similar to the remix for Ver.Sōyoku no Sirius, but they are noticeably different in mood.